document.write('
Error: Feed failed! Causes may be (1) No data found for RSS feed https://www.ndl.go.jp/jp/data/sakuin/rss/000000009472.xml; (2) There are no items are available for this feed; (3) The RSS feed does not validate.
Please verify that the URL https://www.ndl.go.jp/jp/data/sakuin/rss/000000009472.xml works first in your browser and that the feed passes a validator test.